Soldering iron



FIG. 1 is a perspective view of a soldering iron;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a top view thereof, the opposite side being a mirror image ofthe side shown herein.

The portion shown by broken lines is for illustrative purposes only andforms no part of the claimed design.

The ornamental design for a soldering iron, as shown and described.